pilar sheath acanthoma

a benign tumor of the hair follicle, usually occurring as an asymptomatic lesion on the upper lip of middle-aged adults; it is characterized by a central keratin-filled cavity lined by stratified squamous epithelium that projects into the connective stroma.

List of cutaneous conditions — This is an incomplete list, which may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. See also: Cutaneous conditions, Category:Cutaneous conditions, and ICD 10… … Wikipedia